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- Potassium (K) Metal Synonyms:
Potassium ingots, K, potassium blocks, potassium cubes, potassium sticks, CAS# 7440-09-7,
Chemical Name: Potassium
Chemical Formula: K
a) Potassium is silvery-white, soft, and light. It is the second lightest known metal (lithium is the first). Never found native, potassium is found in minerals in most soils. It is an essential component for plant growth and in human and animal nutrition.
b) Since it is one of the most electropositive metals, potassium is very reactive. Like other alkali metals, it decomposes and can ignite spontaneously in water.
98% to 99.95%
Small ingots under argon in glass or small blocks
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Atomic Number
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19
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Molecular Weight (g/mol.)
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39.102
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Apparent Density (g/cm3)
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.86
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RTECS Number
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TS6460000
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Specific Heat @25°C (cal/g-°C)
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.177
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Melting Point (°C)
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63.7
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Boiling Point (°C)
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760
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Thermal Conductivity @200°C (cal/s-cm-°C)
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.107
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Mohs Hardness @20°C
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.5
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Crystallography
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cubic structure, body centered
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a) Potassium forms alloys with many metals, but only the alloy obtained with the sodium has some interest in the technology of nuclear reactors. The more important compounds, from the point of view of applications, are chloride, sulfate, nitrate, carbonate and hydroxide. The salts are used not only as constituents of fertilizers but also for other more specific goals. The sulfate is used as addictive of the gypsum to control its hardening speed and its resistance, the carbonate is used in the production of special glasses and in ceramics, and the potassium nitrate is used in the production of explosives.
b) The potassium chloride, as well as the hydroxide, are the main sources to obtain other salts; the latter one is also used as industrial reagent for producing liquid soaps, as electrolyte in certain batteries and as absorbent of carbon dioxide and hydrogen sulfide.
c) Other less common salts are used in Medicine: the bromide as sedative, the [potassium permanganate] as bactericide, etc.
As required for highly flammable and corrosive chemicals
Yes. For further information please call the E.P.A. at 202.554.1404
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CAS# 7440-09-7
2257
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